23 · Diagnostics

P0100 - debimeter (below lower limit)

Make: Alfa Romeo
Model: 159 Factory Service Manual
Year: 2005–2011
Section: Examiner - diesel electronic management › P0100 - debimeter (below lower limit)

Fault diagnosisP0100 - debimeter (below lower limit)

P0100 - DEBIMETER (BELOW LOWER LIMIT)

1.9 JTD 8V, 1.9 JTD 16V, 2.4 JTD 20V

The diagnostic equipment signals: Error P0100 (Flow meter), with detail "Below the lower limit"

This error is detected if the voltage at the junction unit inlet (Pin 42) is too low (short circuit to earth) for at least 0.3 secs.

0	Preliminary checks	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	First of all check in the engine compartment junction unit See B001 JUNCTION UNIT that fuse F18 has not blown (it is the second from the left in the bottom row).	Move on to Step 1	The fuse has blown	Continue with the test See Test 5505AE ENGINE MANAGEMENT CONTROL UNIT POWER SUPPLY FUSE CIRCUIT CHECK
1	Supply circuit checks	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the engine oil level is correct Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY Check that the air intake/vacuum circuit is working properly by carrying out the test See Test 1048OA AIR INTAKE/VACUUM CIRCUIT CHECK Check the condition of the fuel supply circuit and make sure that it is working properly carrying out the test See Test 1040OA FUEL SUPPLY CIRCUIT CHECK Check the operation of the low pressure supply circuit by carrying out the test See Test 1060OB CHECK ON SUPPLY LOW PRESSURE FUEL CIRCUIT	Move on to Step 2	Oil level incorrect	Restore the correct engine oil level Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY
2	Flow meter operation check	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the flow meter is working properly by carrying out the test See Test 1060GG MEASURED AIR MASS CHECK	End of diagnosis

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